Granted Patent
Utility
US 4,257,053 · App. 06/010,797
High-resolution laser plotter
Inventor:
Cecil R. Gilbreath
Patented Case
View Patent ↗
Granted: Mar 17, 1981
Filed: Feb 9, 1979
Inventor
Cecil R. Gilbreath
Assignee (at issue)
Geosource, Inc.
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.